New opening credits start season 4 with updated clips of Buddy Ebsen and Lee Meriwether. Also, Hank Simms voice over now says, "Barnaby Jones - A Quinn Martin Production."
Theme of the gaslighted, ageing movie star seems to be taken from Requiem for a Falling Star (1973) (with Anne Baxter) and would also be redone in Charlie's Angels (with Ida Lupino) and more.
Guest star Mary Ann Chinn's first of three appearances on "Barnaby Jones".